I've been trying as well, but only on the UZ railway site (web & app). I can get through to the payment screen, though it takes multiple attempts to get the page up to put the card details in. I put the card details in, it says order processing, I get a notification off my bank saying they've taken the cash, it still says order processing, and after about 5 minutes I get a bank notification that the transaction has been reversed and the app/website errors out.
I've tried different cards, and as I said, the app and the website, but the same thing happens every time.
Does anyone have any suggestions?